Neil Lewington's mobile bore the slogan ‘100 per cent white and proud’ and he kept hundreds of racist jokes in his bedroom.

He also had video compilations on various bombers he admired, including London nail bomber and neo-Nazi David Copeland.

Bethan David, Crown Prosecution Service Counter Terrorism Division reviewing lawyer, said: “While holding racist beliefs is not a crime, however distasteful they may be, planning and preparing to attack or terrorise people with explosive devices is a criminal act and the CPS will robustly prosecute anyone who acts in such a way.

“The material collected during the investigation, coupled with the nature of the devices he made, convinced us Lewington was a real threat.”